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The term stems from the low survival rates of patients who experience heart attacks because of blockages of the LAD. The heart muscle must have ample blood supply for a person to survive. When the LAD becomes blocked, the heart is not able to pump blood through that artery. Since the LAD supplies blood to the entire front of the heart, a total blockage of that artery is often fatal.

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A carotid artery screening, or carotid ultrasound, is painless and takes about 30 minutes to complete. Patients lie down on an exam table while an ultrasound technician uses a transducer to view different areas of the neck and the carotid arteries, according to the National Heart, Lung, and Blood Institute.

Left anterior fascicular block is a condition in which a blockage is present in one of the electrical branches that delivers electrical signals to a section of the heart's left ventricle. This cardiac condition is associated with scarring, or fibrosis, of the left ventricle, explains University of California San Francisco.

The Bayer Contour is a medical device that helps diabetics to manage their condition effectively. This blood glucose testing meter is available in different versions that each have unique features, so people can choose the version that will best meet their needs. This product is made by a US based company called Bayer HealthCare LLC.